Charles louis thiery



O. L. THIERY. WATOHGASE.

No. 108,847. Patented Nov. 1, 1870.

Fly. 3. v

anion; $iait5 fitted dffitt Letters Patent No. 108.847, dated November1, 1870.

iM PROVEMENT IN WATCH CASE S- The Schedule referred to in these Letters,Patentend making part of the same.

'1'0 all to whom these presents shall come Be it known that I, CHARLESLouis THIERY, of Illoston, in the county of Sulfolk and State of'Massachusctts, have made an inventionof a new Improvement inWatch-Gases or the Looking Spring-Catch thereof; and do hereby declarethe following to boa l'ull, clear, and exact description thereof, duereference being had to the accompanying drawing making part of thisspecification, and in which Figure 1 is a perspective view.

Figure 2 is a section ota glass-bezel and spring; and

Figure 3, a perspective view of a spring now employed to retain thecover of a watch in a closed state.

Figure 4 is a'1')erspective view and Figure 5, an edged view of myimproved spring for cll'ecting a like result.

Figure 6, a vertical section of a portion of the coverce1 1tcr andglass-bezel ot a watch-case with my improved spring attached thereto.

The improvements herein described are based upon a class of springswhich serve in one piece both as a spring to open. the cover of awatch-case and as a spring-catch to lock such cover, when closed, to thecenter; and such improvements relate to the addition of apcculiar-shaped catch to such a spring, and to such a construction aswell as an arrangement of the spring with respect to the center andglass-bezel of a watch-case as shall obviate the present necessity ofcutting anotch through such glass-bezel in order to accommodate the hookor catch of such spring, the purpose of such an improvement being toavoid the dangerous weakening of such bezel which the notch occasions,and to produce a superior spring atvery small cost. In order toeconomize the limited space of the adjacent parts and effect the desiredresult of locating the hook and catch of the class of springs abovementio' .Ld, outside of the glass-bezel, I have formed such hook of apeculiar shape, or so reduced its thickness and form as to be enabled tosituate it between the outer edge of the glass-bezel and thecircumscribing cover of the case, when the latter is shut, or thatportion of the center of the case which re'eeivcsthe cover. v

The drawing accompanying this specification, and adopted herewith inorder. to illustrate my-invent-ion, represents at A, andin verticalsection, ti". 6, portions of a watch-case, of which ,a is the center, 11the glassbezel, and c the cover.

My improved spring is shown in said fi 4, at (I, as provided with anupright, thin, and shallow-curved termination, c, which rises above: itsgeneral body, f, as represented, this termination constituting aspringcatch which snaps by pressure of the spring into the concavedepression g of the nmer edge of the ooverc, and serves to confine suchcover, when closed, tightly to the center a.

It will be observed by examination of the accompanying drawing, that thenature and disposition of the catch 0 is such that the space interveningbetween theouter edge of the glass-bezel and the inner edge of theperiphery of the cover 0, sutlices to contain it without cutting a notchthrough the glass-bezel to receive it, as is now the ease, and as shownat h in fi 2 of the said drawing.

The notch in the glass-bezel weakens the same to a very considerable andobjectionable extent, as all watch-makers are aware, and my invention,which dispenses with its necessity, is of corresponding value.

The peculiar form of my improved spring, herein explained, or thelooking-catch or head of the same, enables me to punch the whole out ofsheet metal, whereas under the old construction considerable time andlabor was required to fashion it.

concave on its inner side, so that when pressed back it may fit snuglyupon the bezel, as herein shown and set forth.

CHAR-LES LOUIS THIERY.

Witn esscs FRED. CURTIS, Enw. GRIFFITH.

